Laravel批量对象数组验证报错及数组转对象数组咨询

问题场景 #

• API接收单个对象的数组时，验证与入库操作均正常，示例请求格式：

[  
    {
        "datetime": "2022-07-19 12:04:03",
        "receiptNumber" : "4010",
        "isRefund": 0,
        "amount" : 1025
    }
]

• 但传入多个对象的数组时，尝试用foreach遍历数组元素并调用$this->validate()验证时出现错误，示例请求格式：

[  
    {
        "datetime": "2022-07-19 12:04:03",
        "receiptNumber" : "4010",
        "isRefund": 0,
        "amount" : 1025
    },
    {
        "datetime": "2022-07-19 12:04:03",
        "receiptNumber" : "4009",
        "isRefund": 0,
        "amount" : 1025
    }
]

错误代码 #

$array = $request->all();
foreach($array as $sdsa){
    $this->validate($sdsa, [
        'datetime' => 'required|date_format:Y-m-d H:i:s',
        'amount' => 'required|numeric',
        'isRefund' => 'required|integer|between:0,1',
        'receiptNumber' => 'required|string',
    ]);
}

报错信息 #

"message": "Argument 1 passed to App\\Http\\Controllers\\Controller::validate() must be an instance of Illuminate\\Http\\Request, array given"

用户核心需求：将单个关联数组（如下）转换为$this->validate()可接收的结构（本质是转为Request实例）：

array:4 [
  "datetime" => "2022-07-19 12:04:03"
  "receiptNumber" => "4010"
  "isRefund" => 0
  "amount" => 1025
]

解决方法 #

方法一：将数组包装成Request实例 #

$this->validate()的第一个参数必须是Illuminate\Http\Request对象，因此可以把遍历到的数组直接实例化为Request对象：

use Illuminate\Http\Request;

$array = $request->all();
foreach($array as $item){
    // 把单个数组转成Request实例
    $singleRequest = new Request($item);
    $this->validate($singleRequest, [
        'datetime' => 'required|date_format:Y-m-d H:i:s',
        'amount' => 'required|numeric',
        'isRefund' => 'required|integer|between:0,1',
        'receiptNumber' => 'required|string',
    ]);
    // 验证通过后执行入库逻辑
}

方法二：用Validator门面直接验证数组（更推荐） #

不需要转换Request对象，直接使用Validator类验证数组，逻辑更清晰：

use Illuminate\Support\Facades\Validator;

$array = $request->all();
foreach($array as $item){
    $validator = Validator::make($item, [
        'datetime' => 'required|date_format:Y-m-d H:i:s',
        'amount' => 'required|numeric',
        'isRefund' => 'required|integer|between:0,1',
        'receiptNumber' => 'required|string',
    ]);

    if ($validator->fails()) {
        // 处理验证失败，比如返回错误响应
        return response()->json(['errors' => $validator->errors()], 422);
    }
    // 验证通过后执行入库逻辑
}

额外优化：批量验证整个数组 #

如果想一次性验证所有数组元素，可直接使用数组通配符规则，无需循环验证：

$this->validate($request, [
    '*.datetime' => 'required|date_format:Y-m-d H:i:s',
    '*.amount' => 'required|numeric',
    '*.isRefund' => 'required|integer|between:0,1',
    '*.receiptNumber' => 'required|string',
]);

// 验证通过后遍历入库
$array = $request->all();
foreach($array as $item){
    // 执行入库逻辑
}

内容的提问来源于stack exchange，提问作者Mohamed hassan